7. Amy and Delilah were bored of the normal physics torque from class so they wanted to change things up. Delilah confessed to Amy one day weeks back that her mass was 82 kg, but Amy was never going to let Delilah know straight away what her mass was. She wanted Delilah to really work for it, so Delilah put her Physics skills to the test and set up a torque experiment with Amy. They ended up making a large makeshift seesaw. They took the easier route and placed the fulcrum above the center of mass. This seesaw was 15 m long. If Amy was placed at 6 meters from the fulcrum and Delilah was placed at 3 m from the fulcrum on the other side, and the system was balanced, what was Amy's mass